Commitments and Contingencies (Reimbursement) (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2013
Commitments and Contingencies [Abstract]
Letters Of Credit Outstanding Amount 1	$ 33
IVRRH Reimbursement agreement termination date	Jan. 10, 2013
Letters Of Credit Outstanding Termination Fee 1	3.8
Letters Of Credit Outstanding Amount 2	$ 120
Quarterly Reimbursement Fee Percentage	13.00%
Alba Reimbursement Agreement Amendment Date	Mar. 05, 2013
Reimbursement maturity date after extension	Jun. 30, 2014
Alba Reimbursement Agreement LOC Extension Date	Dec. 31, 2014